Falcon Heavy and Arabsat-6A are vertical on Launch Complex 39A. Currently targeting liftoff at 8:00 p.m. EDT; monitoring upper-level winds that could push us to the end of the window (8:32 p.m. EDT) → https://t.co/gtC39uBC7z pic.twitter.com/Vbzbhy6PLz

— SpaceX (@SpaceX) April 10, 2019